Magnesium is a mineral with a fundamentally important physiological function in the body, and is essential in a wide range of fundamental cellular reactions. Complexed with adenosine triphosphate (ATP), the main carrier of metabolic energy in the body, magnesium is essential for all biosynthetic processes, including glycolysis, formation of cyclic adenosine monophosphate (cAMP), energy-dependent membrane transport, and muscle function. Magnesium is also involved in maintaining heart muscle function and normal electrolyte balance. Two-thirds of the body’s magnesium content is located in the skeleton, where it helps to maintain bone health. As typical diets in Canada often provide less than adequate amounts of magnesium, supplementation with a bioavailable magnesium complex can help bridge the gap between dietary intake and optimal requirement.